Starship Asterisk*

Joe 25 wrote:
Any chance of doing a 'past to present' photo comparison on the Orion Bullets ? I've been wondering how they have moved since the first photos of them were taken. I recall there was a comparison done in 2012 or so. Might be time to do another update on this ! Thanks in advance.

ta152h0 wrote:
it was impossible to discern differences when in the past two images of
the horsehead nebula, years apart, were posted here in the recent past.

sunson wrote:Any comments on the star surrounded with what seems to be a THICK layer/disk of dust at the 3-4 (clock wise) position on the image?

bystander wrote: http://asterisk.apod.com/viewtopic.php?t=36968

Hubblesite wrote:
(In) a nebula far, far away, a cluster of stars was waging a real-life star wars, with the stellar members battling each other for supremacy in the Orion Nebula. The gravitational tussle ended with the system breaking apart and at least three stars being ejected in different directions.

Astronomers spotted two of the speedy, wayward stars over the past few decades. They traced both stars back 540 years to the same location and suggested they were part of a now-defunct multiple-star system. But the duo's combined energy, which is propelling them outward, didn't add up. The researchers reasoned there must be at least one other culprit that robbed energy from the stellar toss-up. Now NASA's Hubble Space Telescope has helped astronomers find the final piece of the puzzle by nabbing a third runaway star, which was a member of the same system as the two previously known stars. The stars reside in a small region of young stars called the Kleinmann-Low Nebula, near the center of the vast Orion Nebula complex, located 1,300 light-years from Earth.

Boomer12k wrote:So...um.... where are some rogue planets in this image??? Would like to know...

Plus... my shot of the area... probably my favorite off planet place... bit over exposed on the stars because of cheap camera.

If tonight is decent, might get the scope out...
:---[===] *

Boomer12k wrote:So...um.... where are some rogue planets in this image??? Would like to know ...

http://www.etymonline.com/index.php?term=rogue&allowed_in_frame=0 wrote:

[b][color=#0000FF]NYPD rogues gallery, July 1909.[/color][/b]

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<<rogue (n.) 1560s, "idle vagrant," perhaps a shortened form of roger (with a hard -g-), thieves' slang for a begging vagabond who pretends to be a poor scholar from Oxford or Cambridge, which is perhaps an agent noun in English from Latin rogare "to ask." Another theory traces it to Celtic (compare Breton rog "haughty").

In playful or affectionate use, "one who is mischievous," 1590s. Meaning "large wild beast living apart from the herd" is from 1859, originally of elephants. Meaning "something uncontrolled or undisciplined" is from 1964. Also common in 17c. as a verb. Rogue's gallery "police collection of mug shots" is attested from 1859.>>

APOD Robot wrote:In Orion, supernova explosions and close interactions between stars have created rogue planets and stars that rapidly move through space.

Boomer12k wrote:So...um.... where are some rogue planets in this image??? Would like to know...

Ann wrote:
This is so interesting!

I can't help thinking of three stars that ran away from the Orion Nebula some 2-3 million years ago. The stars are AE Aurigae (the picture is by Adam Block, Mu Columbae (from Palomar Observatory/WikiSky), and 53 Arietis (from Sky and Telescope). These are all massive stars, 53 Arietis some 7.5 solar masses, Mu Columba about 12 solar masses, and AE Aurigae about 17 solar masses.

What about these new runaways, though? They look quite small to me. Is anything known about their spectral classes?

Ann

Monica Young of Sky & Telescope wrote:

The astronomers collected an infrared spectrum of the object, which shows that the protostar weighs in at 2 or 3 solar masses, lower than its runaway companions. (BN is probably 20 solar masses and Source I is 7 solar masses).